* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  position: absolute;
}

body,
html {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: url(../img/首页.png) no-repeat;
  background-size:100% 100%;
}
.opa {
	opacity: 0;
	opacity: 1\9\0;
}
.text1case {
	animation: pro_1_n1 0.5s 0.2s forwards ease;
	-webkit-animation: pro_1_n1 0.5s 0.2s forwards ease;
	-moz-animation: pro_1_n1 0.5s 0.2s forwards ease;
	height: 200px;
	position: fixed;
	top: 50%;
	left: 50%;
	margin-top: -40px;
	margin-left: -452px;
	width:900px;
	font-size: 50px;
	font-weight: normal;
	line-height: 200px;
	line-height: 105px\9;
	*line-height: 105px;
	color: #fff;
	vertical-align: middle;
}
.text2case {
	width: 40%;
	overflow: hidden;
	font-size: 30px;
	line-height: 65px;
	color: #FFFFFF;
	height: 65px;
	position: fixed;
	top: 90%;
	left: 30%;
	margin-top: 50px;
	border-bottom: 3px solid #312F2F;
	animation: pro_1_n1 0.5s 0.3s forwards ease;
	-webkit-animation: pro_1_n1 0.5s 0.3s forwards ease;
	-moz-animation: pro_1_n1 0.5s 0.3s forwards ease;
}

@keyframes pro_1_n1 {
	0% {
		transform: translate(0px, 130px);
		opacity: 0
	}
	30% {
		opacity: 1
	}
	100% {
		transform: translate(0px, 0px);
		opacity: 1
	}
}
@-webkit-keyframes pro_1_n1 {
	0% {
		-webkit-transform: translate(0px, 130px);
		opacity: 0
	}
	30% {
		opacity: 1
	}
	100% {
		-webkit-transform: translate(0px, 0px);
		opacity: 1
	}
}
@-moz-keyframes pro_1_n1 {
	0% {
		-moz-transform: translate(0px, 130px);
		opacity: 0
	}
	30% {
		opacity: 1
	}
	100% {
		-moz-transform: translate(0px, 0px);
		opacity: 1
	}
}




.heading {
	width: 100%;
	height: 320px;
	position: fixed;
	bottom: 60%;
	z-index: 100;
	left: 0px;
	margin-bottom: -147px;
	text-align: center;
}
.bubbles {
  top: 0;
  right: 0;
  left: 0;
  bottom: 0;
  perspective: 1200px;
  perspective-origin: 50% 50%;
  transform-style: preserve-3d;
}
.bubbles .bubble {
  border-radius: 100%;
  transform: translateY(800px) scale(0);
  opacity: 0.8;
  animation-name: bubbles;
  animation-iteration-count: infinite;
  animation-timing-function: ease-in-out;
}
.bubbles .bubble:before {
  content: '';
  position: absolute;
  top: 10%;
  left: 5%;
  width: 90%;
  height: 50%;
  border-radius: 100%;
  filter: blur(5px);
  background: radial-gradient(circle at top, rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0) 58%);
}

.bubble:nth-of-type(1) {
  width: 54px;
  height: 54px;
  top: 71vh;
  left: 80vw;
  animation-delay: 0.0333333333s;
  animation-duration: 31s;
}

.bubble:nth-of-type(2) {
  width: 106px;
  height: 106px;
  top: 84vh;
  left: 98vw;
  animation-delay: 0.0666666667s;
  animation-duration: 4s;
}

.bubble:nth-of-type(3) {
  width: 43px;
  height: 43px;
  top: 34vh;
  left: 82vw;
  animation-delay: 0.1s;
  animation-duration: 12s;
}

.bubble:nth-of-type(4) {
  width: 3px;
  height: 3px;
  top: 73vh;
  left: 78vw;
  animation-delay: 0.1333333333s;
  animation-duration: 16s;
}

.bubble:nth-of-type(5) {
  width: 83px;
  height: 83px;
  top: 40vh;
  left: 12vw;
  animation-delay: 0.1666666667s;
  animation-duration: 3s;
}

.bubble:nth-of-type(6) {
  width: 42px;
  height: 42px;
  top: 74vh;
  left: 36vw;
  animation-delay: 0.2s;
  animation-duration: 37s;
}

.bubble:nth-of-type(7) {
  width: 115px;
  height: 115px;
  top: 88vh;
  left: 62vw;
  animation-delay: 0.2333333333s;
  animation-duration: 28s;
}

.bubble:nth-of-type(8) {
  width: 124px;
  height: 124px;
  top: 10vh;
  left: 83vw;
  animation-delay: 0.2666666667s;
  animation-duration: 8s;
}

.bubble:nth-of-type(9) {
  width: 70px;
  height: 70px;
  top: 65vh;
  left: 51vw;
  animation-delay: 0.3s;
  animation-duration: 3s;
}

.bubble:nth-of-type(10) {
  width: 36px;
  height: 36px;
  top: 95vh;
  left: 30vw;
  animation-delay: 0.3333333333s;
  animation-duration: 19s;
}

.bubble:nth-of-type(11) {
  width: 86px;
  height: 86px;
  top: 69vh;
  left: 52vw;
  animation-delay: 0.3666666667s;
  animation-duration: 37s;
}

.bubble:nth-of-type(12) {
  width: 78px;
  height: 78px;
  top: 77vh;
  left: 62vw;
  animation-delay: 0.4s;
  animation-duration: 27s;
}

@keyframes bubbles {
  100% {
    transform: translateY(-900px) scale(1) rotate(360deg);
  }
}